EN353 Steel Grade Guide
EN353 Round Bars, Flat Bars, Billets & Ingots
What is EN353 Steel?
EN353 is a low-carbon, nickel-chromium case-hardening steel widely used for components that require a hard, wear-resistant surface and a tough, ductile core. After carburizing, quenching, and tempering, EN353 develops excellent fatigue strength and wear resistance, making it ideal for gears, shafts, pinions, and transmission parts.
EN353 is an alloy carburizing steel containing approximately 1% Nickel and 1% Chromium. Its low carbon content allows the core to remain tough after heat treatment, while carburizing produces a high-carbon surface that can be hardened to approximately 58–62 HRC.
Compared to EN36, EN353 offers similar applications but with lower nickel content, making it a cost-effective choice for many automotive and industrial components. At Excellent Steels & Alloys, we supply high-quality EN353 steel in billets, ingots, rounds, and flats, with material sourced from reputed mills and available with test certificates.
Chemical Composition of EN353
| Element | Percentage (%) |
|---|---|
| Carbon (C) | 0.10–0.17 |
| Silicon (Si) | 0.10–0.35 |
| Manganese (Mn) | 0.50–0.80 |
| Chromium (Cr) | 0.90–1.20 |
| Nickel (Ni) | 0.75–1.25 |
| Sulphur (S) | Max 0.035 |
| Phosphorus (P) | Max 0.035 |
Values may vary slightly depending on the manufacturing standard.
Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | 700–900 MPa (core) |
| Yield Strength | 450–650 MPa |
| Elongation | 12–18% |
| Surface Hardness (Carburized) | 58–62 HRC |
| Core Hardness | 30–40 HRC |
Mechanical properties depend on section size and heat treatment.
Key Features of EN353 Steel
Excellent Carburizing Response
Develops a high-carbon surface that can be hardened up to 62 HRC.
Tough and Ductile Core
Provides good impact resistance under heavy-duty loads.
Outstanding Wear Resistance
Ideal for gears, shafts, and continuously wearing parts.
High Fatigue Strength
Suitable for heavy-duty transmission components facing cyclic loading.
Good Dimensional Stability
Maintains dimensional tolerances even after aggressive hardening processes.
Heat Treatment
EN353 achieves its best performance through carburizing. The carburized layer typically ranges from 0.8 mm to 2.0 mm, depending on the application.
Carburizing
Introduces carbon to the surface to form a hard, wear-resistant case layer.
Quenching
Rapid cooling to lock in hardness both in the case and the core.
Tempering
Improves toughness and relieves quenching stresses.
Finish Grinding
Ensures tight dimensional tolerances and surface finish after heat treatment.
Common Applications of EN353
EN353 is extensively used in industries where components are subjected to continuous wear and cyclic loading. Typical applications include:
- Automotive gears
- Transmission shafts
- Pinion gears
- Differential gears
- Camshafts
- Gear blanks
- Worm gears
- Splined shafts
- Bushes and Couplings
- Industrial gearbox components
- Heavy engineering parts
Equivalent Grades
| Standard | Grade |
|---|---|
| Indian | EN353 |
| DIN | 20NiCr1-2 |
| AISI / SAE | 3310 (approximate) |
| ISO | Comparable case-hardening alloy steel |
Note: Equivalent grades should always be verified against application-specific requirements.
Available Forms at Excellent Steels & Alloys
EN353 Billets
- Heavy forging applications
- Gear blanks
- Automotive components
EN353 Ingots
- Forging units
- Steel rolling mills
- Re-melting operations
EN353 Round Bars
- Transmission shafts
- Pinion gears
- Splined shafts
EN353 Flat Bars
- Machine building
- Tool holders
- General engineering components
We can also source custom sizes based on customer requirements.
Frequently Asked Questions
Is EN353 a case-hardening steel?
Yes. EN353 is specifically designed for carburizing and case hardening, producing a hard outer surface with a tough inner core.
What hardness can EN353 achieve?
After carburizing and heat treatment, the surface hardness typically reaches 58–62 HRC.
Can EN353 be welded?
Welding is generally not recommended after heat treatment. If welding is required, appropriate preheating and post-weld heat treatment should be followed.
What is EN353 used for?
EN353 is commonly used for gears, shafts, pinions, splined components, and other parts that require excellent wear resistance and fatigue strength.
What forms do you supply?
Excellent Steels & Alloys supplies EN353 in round bars, flat bars, billets, and ingots.
Looking for EN353 Steel Suppliers in India?
Excellent Steels & Alloys is a trusted supplier of EN353 alloy steel for forging units, machine shops, OEMs, exporters, and heavy engineering industries across India. Contact us today for pricing, availability, and technical assistance. We offer Mill Test Certificates (MTC), verified chemical composition, and bulk supply for custom requirements.
Why Choose Excellent Steels & Alloys for EN353?
We understand the critical role alloy steel plays in precision engineering and heavy-duty applications. Our focus is on consistent quality, reliable supply, and prompt service.
- Mill Test Certificates (MTC)
- Verified chemical composition
- Multiple size availability
- Fast dispatch
- Competitive pricing
- Bulk supply for OEMs and forging units
- Support for custom requirements
Industries Served
- • Automotive manufacturers
- • Gear manufacturers
- • Forging companies
- • Machine shops
- • Heavy engineering industries
- • Industrial gearbox manufacturers
- • Construction equipment manufacturers
- • Agricultural equipment manufacturers
- • Mining equipment manufacturers
Ready to order?
Contact us today for pricing, stock availability, and customized requirements for EN353 Steel.